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i <br /> Sierra-Pacific Groundwater Consultants, Inc. <br /> HYDROGEOLOGISTS& GEOLOGISTS <br /> Y Y <br /> February 7, 1994 .0 <br /> Mr. Dale Matthews _ <br /> PM AG Products <br /> 2115 West Washington Street <br /> Stockton, California 95201 <br /> Subject: 2130 West Washington Street Environmental Work ' <br /> Ground Water Monitoring Program <br /> Sierra-Pacific Project No. 10-92-033 <br /> Dear Dale: <br /> Sierra-Pacific Groundwater Consultants, Inc. (Sierra-Pacific), under contract with Unocal <br /> Corporation (Unocal), has completed two phases of augering and soil sampling at the Cargill <br /> Molasses Division (Cargill), formerly PM AG Products and PureGro Company, 2031 West <br /> Washington Street molasses facility at the Port of Stockton. Two existing monitoring wells at the <br /> site were decommissioned on 30 November 1993, and four new monitoring wells were installed on <br /> 21-22 December 1993. Water levels were measured four times in December, and one sampling <br /> event was completed. Initial test results indicate that nitrate concentrations are present in shallow <br /> ground water. <br /> Water level measurements from the four new monitoring wells at Washington Street indicate that <br /> ground-water was flowing northwest on 27 December 1993. By contrast, water level data from <br /> earlier investigations indicate that ground water tends to flow to the southeast in the west Port of <br /> Stockton area. Recent water level measurements taken at the California Farm Supply property by <br /> another environmental consulting firm are erratic. In conclusion, insufficient data is available to <br /> explain sporadic water level measurements near the Washington Street site. Sierra-Pacific is <br /> investigating several possible factors. <br /> Nick Nickerson (Unocal) recently spoke with Bill Withrow and received tentative permission to <br /> sample your monitoring well, if it still exists. If you still have any monitoring or production wells, <br /> Sierra-Pacific hereby requests permission to measure water levels and sample each of them. On <br /> behalf of Unocal Corporation, Sierra-Pacific must have a signed Right-of-Entry agreement from <br /> PM AG Products to sample any of the wells. An unsigned Right-of-Entry form (and a return <br /> envelop) is enclosed for your approval. <br /> (916)933-1468 <br /> 4911 Windplay Drive,Suite 4 EI Dorado Hills, California 95762 (916)933-3197 FAX <br />